Chinese Researchers Utilize Nuclear Wastewater to Create High-Efficiency Uranium-Based Photoanode for Green Hydrogen Production

Chinese scientists use uranium wastewater to create a U-O-Ti photoanode, increasing water splitting efficiency by 3.8 times for green hydrogen.

By: AXL Media

Published: May 1, 2026, 5:58 AM EDT

Source: Information for this report was sourced from EurekAlert!

Innovative Strategy Converts Nuclear Byproducts into Green Energy Tools

Researchers at the Southwest University of Science and Technology have introduced a novel catalytic design that addresses both nuclear waste management and renewable energy efficiency. By utilizing uranium-containing wastewater as a direct source, the team successfully anchored uranium single atoms onto titanium dioxide nanorod arrays. This process creates atomically asymmetric U, O, and Ti bimetallic active sites that facilitate the oxygen evolution reaction during water splitting. According to Professor Wenkun Zhu and Professor Tao Chen, this covalent regulation of actinide 5f orbitals allows for the high-value reuse of depleted uranium, a resource that previously lacked safe and productive utilization pathways in the hydrogen energy sector.

Bimetallic Active Sites Outperform Traditional Semiconductor Materials

The newly fabricated U/TiO2 photoanode demonstrates a significant leap in performance compared to standard n-type semiconductor materials. Under simulated solar illumination, the material achieved a photocurrent density of 3.25 mA cm−2, which represents a 3.82-fold enhancement over pristine titanium dioxide. This efficiency level surpasses most previously documented titanium-based photoanodes used in photoelectrochemical systems. The research indicates that the material reached an incident photon-to-electron conversion efficiency of 54.5 percent at 380 nm. These metrics suggest that the inclusion of uranium single atoms effectively overcomes the traditional bottlenecks of wide bandgaps and rapid carrier recombination that typically limit titanium dioxide applications.

Structural Stability Meets International Safety Standards for Water Quality

A critical component of the study focused on the long-term operational safety and structural integrity of the uranium-anchored photoanode. During continuous stability testing lasting 50 hours, the researchers observed negligible decay in photocurrent density, indicating a highly durable catalytic interface. Furthermore, the concentration of uranium leaching into the electrolyte remained significantly below the drinking water standards established by the United States. This confirms that the uranium atoms are securely anchored to the substrate, ensuring that the process of generating green hydrogen does not result in secondary environme...